I found an amazon basics color changing smart light bulb attached to a lamp my neighbor threw in the apartment dumpster.

[maehw@chaos.social]

@MLE_online esptool.py can also be used to read from the flash, not only write to it. But it's possible that someone already has done it for such a device.
https://docs.espressif.com/projects/esptool/en/release-v4/esp32/esptool/basic-commands.html

[mle_online@social.afront.org]

@nickzoic that's a good theory

[maehw@chaos.social]

@MLE_online I really have no clue about those devices, but that may be running something called Alexa Connect Kit (ACK) firmware.

Increment Your Device Firmware Version | Alexa Connect Kit

Learn how to set up a consistent versioning system for your HMCU application so that your device firmware is incremented correctly and released to the right users.

Amazon Alexa (developer.amazon.com)

[mle_online@social.afront.org]

@maehw yeah, i saw that too

[stellafoxxie@oldbytes.space]

@MLE_online ooo i bet you could extract their wifi password from it

[madrabbit@chaos.social]

@MLE_online I think people I know have run WLED on those bulbs or similar ones

[mle_online@social.afront.org]

@maehw That seems promising. I'm not really sure where to start though

[riverpunk@defcon.social]

@MLE_online how else are they supposed to spy on you and sell your data to surveillance companies so that they can determine if you qualify for housing 10 years from now?

[peaceman@mastodon.social]

@RueNahcMohr @MLE_online best opportunity to make a robot out of it!

[knowattitude@m.ai6yr.org]

@larrybiggs @MLE_online
How did the term "hacking" come to be a thing?

[ftg@mastodon.radio]

@MLE_online
Oh cool. A new ESP32 board source.
It's even on a desolderable module.
And ESP32 is more hackable than the Silabs EFR32 in IKEA Trodfri's.
At least until I port the Gekkokapula firmware to the module I pulled form one and get on 2.4GHz FM with one.

[mle_online@social.afront.org]

@ftg I'm not getting anywhere with connecting to the module, however. I've got it wired up to an FTDI device, but esptools fails to connect to it, and I don't know why

[steter@mastodon.stevesworld.co]

@MLE_online Someone could sniff the bluetooth to see what it sends/receives, then create code for phone or PC (if it has bluetooth installed) to mimic transfers. Such a person would probably want a working app to watch, so they know which data each command sends/receives. Without that, it would be difficult. Unless the bulb came with an API, which should make it very easy.

[realgene@hachyderm.io]

@MLE_online @ftg
There's probably a requirement to pull a particular pin down at power on to enable the ROM loader.

[bytex64@awesome.garden]

@MLE_online You could probably just throw tasmota32.factory.bin on there but I can’t see anything that says it supports the BP1838. http://ota.tasmota.com/tasmota32/release/

[mhkohne@mastodon.social]

@SnoopJ @MLE_online Even if they set the 'no read' bit, what matters is the processor's approach to it. Some processors will still let you clear that bit (and thus wipe the on-board flash), while others won't, making the stupid thing e-waste (I'm scowling at you to Infineon). I've not done esp32, so I don't know their approach.

[ruenahcmohr@infosec.exchange]

@projectgus @MLE_online From what I see, its an esp32. which, IS halarious.

[scribblesonnapkins@mastodon.social]

@MLE_online @SnoopJ
It's not as complicated as it sounds. Is it something you want to explore?

[ruenahcmohr@infosec.exchange]

RE: https://social.afront.org/@MLE_online/116116635764812056

@projectgus @MLE_online

Infosec Exchange

(infosec.exchange)

[rcgj_oxphys@floss.social]

@MLE_online In case it's of interest to anyone reading this: the datasheet indicates these can be locked down using eFuse bits that "can't be unset" (paraphrase) I would expect these to be set on an IoT device (tho' some of the products I've seen written about here… yeesh. so you never know)

I didn't find info for ESP32 about resetting these, but for AVR chips this has reportedly been possible, with some detail here: https://web.archive.org/web/20210506151334/https://sites.google.com/site/pbykec/projects/index/hvsp
hopefully it gives some helpful clues.